| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for readily measuring the viscosity of a substance, in particular a method and an instrument for measuring viscosity of a highly viscous substance and a substance of a high temperature. SOLUTION: In this viscosity-measuring method, a sensor joined with a viscous-resistance transmission member for transmitting viscous resistance to a piezoelectric vibration element is used as a viscosity sensor, the tip of the viscous-resistance transmission member in the sensor is inserted into a sample, an alternating current electrical signal of a frequency, slightly shifted from a resonance frequency of the element, is impressed on the element under the conditions hereinbefore, and an electric signal output from the element is converted into a voltage signal to be measured.
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